net/mac80211/ieee80211_i.h

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007-2008  Johannes Berg <johannes@sipsolutions.net>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #ifndef IEEE80211_I_H
  13 #define IEEE80211_I_H
  14
  15 #include <linux/kernel.h>
  16 #include <linux/device.h>
  17 #include <linux/if_ether.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/list.h>
  20 #include <linux/netdevice.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/types.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/etherdevice.h>
  26 #include <net/cfg80211.h>
  27 #include <net/wireless.h>
  28 #include <net/iw_handler.h>
  29 #include <net/mac80211.h>
  30 #include "key.h"
  31 #include "sta_info.h"
  32
  33 struct ieee80211_local;
  34
  35 /* Maximum number of broadcast/multicast frames to buffer when some of the
  36  * associated stations are using power saving. */
  37 #define AP_MAX_BC_BUFFER 128
  38
  39 /* Maximum number of frames buffered to all STAs, including multicast frames.
  40  * Note: increasing this limit increases the potential memory requirement. Each
  41  * frame can be up to about 2 kB long. */
  42 #define TOTAL_MAX_TX_BUFFER 512
  43
  44 /* Required encryption head and tailroom */
  45 #define IEEE80211_ENCRYPT_HEADROOM 8
  46 #define IEEE80211_ENCRYPT_TAILROOM 18
  47
  48 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  49  * reception of at least three fragmented frames. This limit can be increased
  50  * by changing this define, at the cost of slower frame reassembly and
  51  * increased memory use (about 2 kB of RAM per entry). */
  52 #define IEEE80211_FRAGMENT_MAX 4
  53
  54 /*
  55  * Time after which we ignore scan results and no longer report/use
  56  * them in any way.
  57  */
  58 #define IEEE80211_SCAN_RESULT_EXPIRE (10 * HZ)
  59
  60 #define TU_TO_EXP_TIME(x)       (jiffies + usecs_to_jiffies((x) * 1024))
  61
  62 struct ieee80211_fragment_entry {
  63         unsigned long first_frag_time;
  64         unsigned int seq;
  65         unsigned int rx_queue;
  66         unsigned int last_frag;
  67         unsigned int extra_len;
  68         struct sk_buff_head skb_list;
  69         int ccmp; /* Whether fragments were encrypted with CCMP */
  70         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
  71 };
  72
  73
  74 struct ieee80211_bss {
  75         struct list_head list;
  76         struct ieee80211_bss *hnext;
  77         size_t ssid_len;
  78
  79         atomic_t users;
  80
  81         u8 bssid[ETH_ALEN];
  82         u8 ssid[IEEE80211_MAX_SSID_LEN];
  83         u8 dtim_period;
  84         u16 capability; /* host byte order */
  85         enum ieee80211_band band;
  86         int freq;
  87         int signal, noise, qual;
  88         u8 *ies; /* all information elements from the last Beacon or Probe
  89                   * Response frames; note Beacon frame is not allowed to
  90                   * override values from Probe Response */
  91         size_t ies_len;
  92         bool wmm_used;
  93 #ifdef CONFIG_MAC80211_MESH
  94         u8 *mesh_id;
  95         size_t mesh_id_len;
  96         u8 *mesh_cfg;
  97 #endif
  98 #define IEEE80211_MAX_SUPP_RATES 32
  99         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 100         size_t supp_rates_len;
 101         u64 timestamp;
 102         int beacon_int;
 103
 104         unsigned long last_probe_resp;
 105         unsigned long last_update;
 106
 107         /* during assocation, we save an ERP value from a probe response so
 108          * that we can feed ERP info to the driver when handling the
 109          * association completes. these fields probably won't be up-to-date
 110          * otherwise, you probably don't want to use them. */
 111         int has_erp_value;
 112         u8 erp_value;
 113 };
 114
 115 static inline u8 *bss_mesh_cfg(struct ieee80211_bss *bss)
 116 {
 117 #ifdef CONFIG_MAC80211_MESH
 118         return bss->mesh_cfg;
 119 #endif
 120         return NULL;
 121 }
 122
 123 static inline u8 *bss_mesh_id(struct ieee80211_bss *bss)
 124 {
 125 #ifdef CONFIG_MAC80211_MESH
 126         return bss->mesh_id;
 127 #endif
 128         return NULL;
 129 }
 130
 131 static inline u8 bss_mesh_id_len(struct ieee80211_bss *bss)
 132 {
 133 #ifdef CONFIG_MAC80211_MESH
 134         return bss->mesh_id_len;
 135 #endif
 136         return 0;
 137 }
 138
 139
 140 typedef unsigned __bitwise__ ieee80211_tx_result;
 141 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 142 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 143 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 144
 145 #define IEEE80211_TX_FRAGMENTED         BIT(0)
 146 #define IEEE80211_TX_UNICAST            BIT(1)
 147 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 148
 149 struct ieee80211_tx_data {
 150         struct sk_buff *skb;
 151         struct net_device *dev;
 152         struct ieee80211_local *local;
 153         struct ieee80211_sub_if_data *sdata;
 154         struct sta_info *sta;
 155         struct ieee80211_key *key;
 156
 157         struct ieee80211_channel *channel;
 158
 159         /* Extra fragments (in addition to the first fragment
 160          * in skb) */
 161         struct sk_buff **extra_frag;
 162         int num_extra_frag;
 163
 164         u16 ethertype;
 165         unsigned int flags;
 166 };
 167
 168
 169 typedef unsigned __bitwise__ ieee80211_rx_result;
 170 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 171 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 172 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 173 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 174
 175 #define IEEE80211_RX_IN_SCAN            BIT(0)
 176 /* frame is destined to interface currently processed (incl. multicast frames) */
 177 #define IEEE80211_RX_RA_MATCH           BIT(1)
 178 #define IEEE80211_RX_AMSDU              BIT(2)
 179 #define IEEE80211_RX_CMNTR_REPORTED     BIT(3)
 180 #define IEEE80211_RX_FRAGMENTED         BIT(4)
 181
 182 struct ieee80211_rx_data {
 183         struct sk_buff *skb;
 184         struct net_device *dev;
 185         struct ieee80211_local *local;
 186         struct ieee80211_sub_if_data *sdata;
 187         struct sta_info *sta;
 188         struct ieee80211_key *key;
 189         struct ieee80211_rx_status *status;
 190         struct ieee80211_rate *rate;
 191
 192         unsigned int flags;
 193         int sent_ps_buffered;
 194         int queue;
 195         u32 tkip_iv32;
 196         u16 tkip_iv16;
 197 };
 198
 199 struct ieee80211_tx_stored_packet {
 200         struct sk_buff *skb;
 201         struct sk_buff **extra_frag;
 202         int num_extra_frag;
 203 };
 204
 205 struct beacon_data {
 206         u8 *head, *tail;
 207         int head_len, tail_len;
 208         int dtim_period;
 209 };
 210
 211 struct ieee80211_if_ap {
 212         struct beacon_data *beacon;
 213
 214         struct list_head vlans;
 215
 216         /* yes, this looks ugly, but guarantees that we can later use
 217          * bitmap_empty :)
 218          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 219         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)];
 220         struct sk_buff_head ps_bc_buf;
 221         atomic_t num_sta_ps; /* number of stations in PS mode */
 222         int dtim_count;
 223 };
 224
 225 struct ieee80211_if_wds {
 226         struct sta_info *sta;
 227         u8 remote_addr[ETH_ALEN];
 228 };
 229
 230 struct ieee80211_if_vlan {
 231         struct list_head list;
 232 };
 233
 234 struct mesh_stats {
 235         __u32 fwded_frames;             /* Mesh forwarded frames */
 236         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 237         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 238         atomic_t estab_plinks;
 239 };
 240
 241 #define PREQ_Q_F_START          0x1
 242 #define PREQ_Q_F_REFRESH        0x2
 243 struct mesh_preq_queue {
 244         struct list_head list;
 245         u8 dst[ETH_ALEN];
 246         u8 flags;
 247 };
 248
 249 /* flags used in struct ieee80211_if_sta.flags */
 250 #define IEEE80211_STA_SSID_SET          BIT(0)
 251 #define IEEE80211_STA_BSSID_SET         BIT(1)
 252 #define IEEE80211_STA_PREV_BSSID_SET    BIT(2)
 253 #define IEEE80211_STA_AUTHENTICATED     BIT(3)
 254 #define IEEE80211_STA_ASSOCIATED        BIT(4)
 255 #define IEEE80211_STA_PROBEREQ_POLL     BIT(5)
 256 #define IEEE80211_STA_CREATE_IBSS       BIT(6)
 257 #define IEEE80211_STA_MIXED_CELL        BIT(7)
 258 #define IEEE80211_STA_WMM_ENABLED       BIT(8)
 259 #define IEEE80211_STA_AUTO_SSID_SEL     BIT(10)
 260 #define IEEE80211_STA_AUTO_BSSID_SEL    BIT(11)
 261 #define IEEE80211_STA_AUTO_CHANNEL_SEL  BIT(12)
 262 #define IEEE80211_STA_PRIVACY_INVOKED   BIT(13)
 263 #define IEEE80211_STA_TKIP_WEP_USED     BIT(14)
 264 #define IEEE80211_STA_CSA_RECEIVED      BIT(15)
 265 #define IEEE80211_STA_MFP_ENABLED       BIT(16)
 266 /* flags for MLME request */
 267 #define IEEE80211_STA_REQ_SCAN 0
 268 #define IEEE80211_STA_REQ_DIRECT_PROBE 1
 269 #define IEEE80211_STA_REQ_AUTH 2
 270 #define IEEE80211_STA_REQ_RUN  3
 271
 272 /* STA/IBSS MLME states */
 273 enum ieee80211_sta_mlme_state {
 274         IEEE80211_STA_MLME_DISABLED,
 275         IEEE80211_STA_MLME_DIRECT_PROBE,
 276         IEEE80211_STA_MLME_AUTHENTICATE,
 277         IEEE80211_STA_MLME_ASSOCIATE,
 278         IEEE80211_STA_MLME_ASSOCIATED,
 279         IEEE80211_STA_MLME_IBSS_SEARCH,
 280         IEEE80211_STA_MLME_IBSS_JOINED,
 281 };
 282
 283 /* bitfield of allowed auth algs */
 284 #define IEEE80211_AUTH_ALG_OPEN BIT(0)
 285 #define IEEE80211_AUTH_ALG_SHARED_KEY BIT(1)
 286 #define IEEE80211_AUTH_ALG_LEAP BIT(2)
 287
 288 struct ieee80211_if_sta {
 289         struct timer_list timer;
 290         struct timer_list chswitch_timer;
 291         struct work_struct work;
 292         struct work_struct chswitch_work;
 293         u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN];
 294         u8 ssid[IEEE80211_MAX_SSID_LEN];
 295         enum ieee80211_sta_mlme_state state;
 296         size_t ssid_len;
 297         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 298         size_t scan_ssid_len;
 299         u16 aid;
 300         u16 ap_capab, capab;
 301         u8 *extra_ie; /* to be added to the end of AssocReq */
 302         size_t extra_ie_len;
 303
 304         /* The last AssocReq/Resp IEs */
 305         u8 *assocreq_ies, *assocresp_ies;
 306         size_t assocreq_ies_len, assocresp_ies_len;
 307
 308         struct sk_buff_head skb_queue;
 309
 310         int assoc_scan_tries; /* number of scans done pre-association */
 311         int direct_probe_tries; /* retries for direct probes */
 312         int auth_tries; /* retries for auth req */
 313         int assoc_tries; /* retries for assoc req */
 314
 315         unsigned long request;
 316
 317         unsigned long last_probe;
 318
 319         unsigned int flags;
 320
 321         unsigned int auth_algs; /* bitfield of allowed auth algs */
 322         int auth_alg; /* currently used IEEE 802.11 authentication algorithm */
 323         int auth_transaction;
 324
 325         enum {
 326                 IEEE80211_MFP_DISABLED,
 327                 IEEE80211_MFP_OPTIONAL,
 328                 IEEE80211_MFP_REQUIRED
 329         } mfp; /* management frame protection */
 330
 331         unsigned long ibss_join_req;
 332         struct sk_buff *probe_resp; /* ProbeResp template for IBSS */
 333         u32 supp_rates_bits[IEEE80211_NUM_BANDS];
 334
 335         int wmm_last_param_set;
 336
 337         /* Extra IE data for management frames */
 338         u8 *ie_probereq;
 339         size_t ie_probereq_len;
 340         u8 *ie_proberesp;
 341         size_t ie_proberesp_len;
 342         u8 *ie_auth;
 343         size_t ie_auth_len;
 344         u8 *ie_assocreq;
 345         size_t ie_assocreq_len;
 346         u8 *ie_reassocreq;
 347         size_t ie_reassocreq_len;
 348         u8 *ie_deauth;
 349         size_t ie_deauth_len;
 350         u8 *ie_disassoc;
 351         size_t ie_disassoc_len;
 352 };
 353
 354 struct ieee80211_if_mesh {
 355         struct work_struct work;
 356         struct timer_list housekeeping_timer;
 357         struct timer_list mesh_path_timer;
 358         struct sk_buff_head skb_queue;
 359
 360         bool housekeeping;
 361
 362         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 363         size_t mesh_id_len;
 364         /* Active Path Selection Protocol Identifier */
 365         u8 mesh_pp_id[4];
 366         /* Active Path Selection Metric Identifier */
 367         u8 mesh_pm_id[4];
 368         /* Congestion Control Mode Identifier */
 369         u8 mesh_cc_id[4];
 370         /* Local mesh Destination Sequence Number */
 371         u32 dsn;
 372         /* Last used PREQ ID */
 373         u32 preq_id;
 374         atomic_t mpaths;
 375         /* Timestamp of last DSN update */
 376         unsigned long last_dsn_update;
 377         /* Timestamp of last DSN sent */
 378         unsigned long last_preq;
 379         struct mesh_rmc *rmc;
 380         spinlock_t mesh_preq_queue_lock;
 381         struct mesh_preq_queue preq_queue;
 382         int preq_queue_len;
 383         struct mesh_stats mshstats;
 384         struct mesh_config mshcfg;
 385         u32 mesh_seqnum;
 386         bool accepting_plinks;
 387 };
 388
 389 #ifdef CONFIG_MAC80211_MESH
 390 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 391         do { (msh)->mshstats.name++; } while (0)
 392 #else
 393 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 394         do { } while (0)
 395 #endif
 396
 397 /**
 398  * enum ieee80211_sub_if_data_flags - virtual interface flags
 399  *
 400  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 401  * @IEEE80211_SDATA_PROMISC: interface is promisc
 402  * @IEEE80211_SDATA_USERSPACE_MLME: userspace MLME is active
 403  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 404  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 405  *      associated stations and deliver multicast frames both
 406  *      back to wireless media and to the local net stack.
 407  */
 408 enum ieee80211_sub_if_data_flags {
 409         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 410         IEEE80211_SDATA_PROMISC                 = BIT(1),
 411         IEEE80211_SDATA_USERSPACE_MLME          = BIT(2),
 412         IEEE80211_SDATA_OPERATING_GMODE         = BIT(3),
 413         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(4),
 414 };
 415
 416 struct ieee80211_sub_if_data {
 417         struct list_head list;
 418
 419         struct wireless_dev wdev;
 420
 421         /* keys */
 422         struct list_head key_list;
 423
 424         struct net_device *dev;
 425         struct ieee80211_local *local;
 426
 427         unsigned int flags;
 428
 429         int drop_unencrypted;
 430
 431         /* Fragment table for host-based reassembly */
 432         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 433         unsigned int fragment_next;
 434
 435 #define NUM_DEFAULT_KEYS 4
 436 #define NUM_DEFAULT_MGMT_KEYS 2
 437         struct ieee80211_key *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 438         struct ieee80211_key *default_key;
 439         struct ieee80211_key *default_mgmt_key;
 440
 441         u16 sequence_number;
 442
 443         /*
 444          * AP this belongs to: self in AP mode and
 445          * corresponding AP in VLAN mode, NULL for
 446          * all others (might be needed later in IBSS)
 447          */
 448         struct ieee80211_if_ap *bss;
 449
 450         int force_unicast_rateidx; /* forced TX rateidx for unicast frames */
 451         int max_ratectrl_rateidx; /* max TX rateidx for rate control */
 452
 453         union {
 454                 struct ieee80211_if_ap ap;
 455                 struct ieee80211_if_wds wds;
 456                 struct ieee80211_if_vlan vlan;
 457                 struct ieee80211_if_sta sta;
 458 #ifdef CONFIG_MAC80211_MESH
 459                 struct ieee80211_if_mesh mesh;
 460 #endif
 461                 u32 mntr_flags;
 462         } u;
 463
 464 #ifdef CONFIG_MAC80211_DEBUGFS
 465         struct dentry *debugfsdir;
 466         union {
 467                 struct {
 468                         struct dentry *drop_unencrypted;
 469                         struct dentry *state;
 470                         struct dentry *bssid;
 471                         struct dentry *prev_bssid;
 472                         struct dentry *ssid_len;
 473                         struct dentry *aid;
 474                         struct dentry *ap_capab;
 475                         struct dentry *capab;
 476                         struct dentry *extra_ie_len;
 477                         struct dentry *auth_tries;
 478                         struct dentry *assoc_tries;
 479                         struct dentry *auth_algs;
 480                         struct dentry *auth_alg;
 481                         struct dentry *auth_transaction;
 482                         struct dentry *flags;
 483                         struct dentry *force_unicast_rateidx;
 484                         struct dentry *max_ratectrl_rateidx;
 485                 } sta;
 486                 struct {
 487                         struct dentry *drop_unencrypted;
 488                         struct dentry *num_sta_ps;
 489                         struct dentry *dtim_count;
 490                         struct dentry *force_unicast_rateidx;
 491                         struct dentry *max_ratectrl_rateidx;
 492                         struct dentry *num_buffered_multicast;
 493                 } ap;
 494                 struct {
 495                         struct dentry *drop_unencrypted;
 496                         struct dentry *peer;
 497                         struct dentry *force_unicast_rateidx;
 498                         struct dentry *max_ratectrl_rateidx;
 499                 } wds;
 500                 struct {
 501                         struct dentry *drop_unencrypted;
 502                         struct dentry *force_unicast_rateidx;
 503                         struct dentry *max_ratectrl_rateidx;
 504                 } vlan;
 505                 struct {
 506                         struct dentry *mode;
 507                 } monitor;
 508         } debugfs;
 509         struct {
 510                 struct dentry *default_key;
 511                 struct dentry *default_mgmt_key;
 512         } common_debugfs;
 513
 514 #ifdef CONFIG_MAC80211_MESH
 515         struct dentry *mesh_stats_dir;
 516         struct {
 517                 struct dentry *fwded_frames;
 518                 struct dentry *dropped_frames_ttl;
 519                 struct dentry *dropped_frames_no_route;
 520                 struct dentry *estab_plinks;
 521                 struct timer_list mesh_path_timer;
 522         } mesh_stats;
 523
 524         struct dentry *mesh_config_dir;
 525         struct {
 526                 struct dentry *dot11MeshRetryTimeout;
 527                 struct dentry *dot11MeshConfirmTimeout;
 528                 struct dentry *dot11MeshHoldingTimeout;
 529                 struct dentry *dot11MeshMaxRetries;
 530                 struct dentry *dot11MeshTTL;
 531                 struct dentry *auto_open_plinks;
 532                 struct dentry *dot11MeshMaxPeerLinks;
 533                 struct dentry *dot11MeshHWMPactivePathTimeout;
 534                 struct dentry *dot11MeshHWMPpreqMinInterval;
 535                 struct dentry *dot11MeshHWMPnetDiameterTraversalTime;
 536                 struct dentry *dot11MeshHWMPmaxPREQretries;
 537                 struct dentry *path_refresh_time;
 538                 struct dentry *min_discovery_timeout;
 539         } mesh_config;
 540 #endif
 541
 542 #endif
 543         /* must be last, dynamically sized area in this! */
 544         struct ieee80211_vif vif;
 545 };
 546
 547 static inline
 548 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 549 {
 550         return container_of(p, struct ieee80211_sub_if_data, vif);
 551 }
 552
 553 static inline void
 554 ieee80211_sdata_set_mesh_id(struct ieee80211_sub_if_data *sdata,
 555                             u8 mesh_id_len, u8 *mesh_id)
 556 {
 557 #ifdef CONFIG_MAC80211_MESH
 558         struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
 559         ifmsh->mesh_id_len = mesh_id_len;
 560         memcpy(ifmsh->mesh_id, mesh_id, mesh_id_len);
 561 #else
 562         WARN_ON(1);
 563 #endif
 564 }
 565
 566 enum {
 567         IEEE80211_RX_MSG        = 1,
 568         IEEE80211_TX_STATUS_MSG = 2,
 569         IEEE80211_DELBA_MSG     = 3,
 570         IEEE80211_ADDBA_MSG     = 4,
 571 };
 572
 573 enum queue_stop_reason {
 574         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 575         IEEE80211_QUEUE_STOP_REASON_PS,
 576         IEEE80211_QUEUE_STOP_REASON_CSA
 577 };
 578
 579 /* maximum number of hardware queues we support. */
 580 #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES)
 581
 582 struct ieee80211_master_priv {
 583         struct ieee80211_local *local;
 584 };
 585
 586 struct ieee80211_local {
 587         /* embed the driver visible part.
 588          * don't cast (use the static inlines below), but we keep
 589          * it first anyway so they become a no-op */
 590         struct ieee80211_hw hw;
 591
 592         const struct ieee80211_ops *ops;
 593
 594         unsigned long queue_pool[BITS_TO_LONGS(QD_MAX_QUEUES)];
 595         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
 596         spinlock_t queue_stop_reason_lock;
 597         struct net_device *mdev; /* wmaster# - "master" 802.11 device */
 598         int open_count;
 599         int monitors, cooked_mntrs;
 600         /* number of interfaces with corresponding FIF_ flags */
 601         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss;
 602         unsigned int filter_flags; /* FIF_* */
 603         struct iw_statistics wstats;
 604         u8 wstats_flags;
 605         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
 606         int tx_headroom; /* required headroom for hardware/radiotap */
 607
 608         /* Tasklet and skb queue to process calls from IRQ mode. All frames
 609          * added to skb_queue will be processed, but frames in
 610          * skb_queue_unreliable may be dropped if the total length of these
 611          * queues increases over the limit. */
 612 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
 613         struct tasklet_struct tasklet;
 614         struct sk_buff_head skb_queue;
 615         struct sk_buff_head skb_queue_unreliable;
 616
 617         /* Station data */
 618         /*
 619          * The lock only protects the list, hash, timer and counter
 620          * against manipulation, reads are done in RCU. Additionally,
 621          * the lock protects each BSS's TIM bitmap.
 622          */
 623         spinlock_t sta_lock;
 624         unsigned long num_sta;
 625         struct list_head sta_list;
 626         struct list_head sta_flush_list;
 627         struct work_struct sta_flush_work;
 628         struct sta_info *sta_hash[STA_HASH_SIZE];
 629         struct timer_list sta_cleanup;
 630
 631         unsigned long queues_pending[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 632         unsigned long queues_pending_run[BITS_TO_LONGS(IEEE80211_MAX_QUEUES)];
 633         struct ieee80211_tx_stored_packet pending_packet[IEEE80211_MAX_QUEUES];
 634         struct tasklet_struct tx_pending_tasklet;
 635
 636         /* number of interfaces with corresponding IFF_ flags */
 637         atomic_t iff_allmultis, iff_promiscs;
 638
 639         struct rate_control_ref *rate_ctrl;
 640
 641         int rts_threshold;
 642         int fragmentation_threshold;
 643
 644         struct crypto_blkcipher *wep_tx_tfm;
 645         struct crypto_blkcipher *wep_rx_tfm;
 646         u32 wep_iv;
 647
 648         /* see iface.c */
 649         struct list_head interfaces;
 650         struct mutex iflist_mtx;
 651
 652         /*
 653          * Key lock, protects sdata's key_list and sta_info's
 654          * key pointers (write access, they're RCU.)
 655          */
 656         spinlock_t key_lock;
 657
 658
 659         /* Scanning and BSS list */
 660         bool sw_scanning, hw_scanning;
 661         int scan_channel_idx;
 662         enum ieee80211_band scan_band;
 663
 664         enum { SCAN_SET_CHANNEL, SCAN_SEND_PROBE } scan_state;
 665         unsigned long last_scan_completed;
 666         struct delayed_work scan_work;
 667         struct ieee80211_sub_if_data *scan_sdata;
 668         struct ieee80211_channel *oper_channel, *scan_channel, *csa_channel;
 669         enum nl80211_channel_type oper_channel_type;
 670         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 671         size_t scan_ssid_len;
 672         struct list_head bss_list;
 673         struct ieee80211_bss *bss_hash[STA_HASH_SIZE];
 674         spinlock_t bss_lock;
 675
 676         /* SNMP counters */
 677         /* dot11CountersTable */
 678         u32 dot11TransmittedFragmentCount;
 679         u32 dot11MulticastTransmittedFrameCount;
 680         u32 dot11FailedCount;
 681         u32 dot11RetryCount;
 682         u32 dot11MultipleRetryCount;
 683         u32 dot11FrameDuplicateCount;
 684         u32 dot11ReceivedFragmentCount;
 685         u32 dot11MulticastReceivedFrameCount;
 686         u32 dot11TransmittedFrameCount;
 687
 688 #ifdef CONFIG_MAC80211_LEDS
 689         int tx_led_counter, rx_led_counter;
 690         struct led_trigger *tx_led, *rx_led, *assoc_led, *radio_led;
 691         char tx_led_name[32], rx_led_name[32],
 692              assoc_led_name[32], radio_led_name[32];
 693 #endif
 694
 695 #ifdef CONFIG_MAC80211_DEBUGFS
 696         struct work_struct sta_debugfs_add;
 697 #endif
 698
 699 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 700         /* TX/RX handler statistics */
 701         unsigned int tx_handlers_drop;
 702         unsigned int tx_handlers_queued;
 703         unsigned int tx_handlers_drop_unencrypted;
 704         unsigned int tx_handlers_drop_fragment;
 705         unsigned int tx_handlers_drop_wep;
 706         unsigned int tx_handlers_drop_not_assoc;
 707         unsigned int tx_handlers_drop_unauth_port;
 708         unsigned int rx_handlers_drop;
 709         unsigned int rx_handlers_queued;
 710         unsigned int rx_handlers_drop_nullfunc;
 711         unsigned int rx_handlers_drop_defrag;
 712         unsigned int rx_handlers_drop_short;
 713         unsigned int rx_handlers_drop_passive_scan;
 714         unsigned int tx_expand_skb_head;
 715         unsigned int tx_expand_skb_head_cloned;
 716         unsigned int rx_expand_skb_head;
 717         unsigned int rx_expand_skb_head2;
 718         unsigned int rx_handlers_fragments;
 719         unsigned int tx_status_drop;
 720 #define I802_DEBUG_INC(c) (c)++
 721 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
 722 #define I802_DEBUG_INC(c) do { } while (0)
 723 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
 724
 725
 726         int total_ps_buffered; /* total number of all buffered unicast and
 727                                 * multicast packets for power saving stations
 728                                 */
 729         int wifi_wme_noack_test;
 730         unsigned int wmm_acm; /* bit field of ACM bits (BIT(802.1D tag)) */
 731
 732         bool powersave;
 733         bool pspolling;
 734         struct work_struct dynamic_ps_enable_work;
 735         struct work_struct dynamic_ps_disable_work;
 736         struct timer_list dynamic_ps_timer;
 737
 738         int user_power_level; /* in dBm */
 739         int power_constr_level; /* in dBm */
 740
 741 #ifdef CONFIG_MAC80211_DEBUGFS
 742         struct local_debugfsdentries {
 743                 struct dentry *rcdir;
 744                 struct dentry *rcname;
 745                 struct dentry *frequency;
 746                 struct dentry *rts_threshold;
 747                 struct dentry *fragmentation_threshold;
 748                 struct dentry *short_retry_limit;
 749                 struct dentry *long_retry_limit;
 750                 struct dentry *total_ps_buffered;
 751                 struct dentry *wep_iv;
 752                 struct dentry *tsf;
 753                 struct dentry *statistics;
 754                 struct local_debugfsdentries_statsdentries {
 755                         struct dentry *transmitted_fragment_count;
 756                         struct dentry *multicast_transmitted_frame_count;
 757                         struct dentry *failed_count;
 758                         struct dentry *retry_count;
 759                         struct dentry *multiple_retry_count;
 760                         struct dentry *frame_duplicate_count;
 761                         struct dentry *received_fragment_count;
 762                         struct dentry *multicast_received_frame_count;
 763                         struct dentry *transmitted_frame_count;
 764                         struct dentry *wep_undecryptable_count;
 765                         struct dentry *num_scans;
 766 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
 767                         struct dentry *tx_handlers_drop;
 768                         struct dentry *tx_handlers_queued;
 769                         struct dentry *tx_handlers_drop_unencrypted;
 770                         struct dentry *tx_handlers_drop_fragment;
 771                         struct dentry *tx_handlers_drop_wep;
 772                         struct dentry *tx_handlers_drop_not_assoc;
 773                         struct dentry *tx_handlers_drop_unauth_port;
 774                         struct dentry *rx_handlers_drop;
 775                         struct dentry *rx_handlers_queued;
 776                         struct dentry *rx_handlers_drop_nullfunc;
 777                         struct dentry *rx_handlers_drop_defrag;
 778                         struct dentry *rx_handlers_drop_short;
 779                         struct dentry *rx_handlers_drop_passive_scan;
 780                         struct dentry *tx_expand_skb_head;
 781                         struct dentry *tx_expand_skb_head_cloned;
 782                         struct dentry *rx_expand_skb_head;
 783                         struct dentry *rx_expand_skb_head2;
 784                         struct dentry *rx_handlers_fragments;
 785                         struct dentry *tx_status_drop;
 786 #endif
 787                         struct dentry *dot11ACKFailureCount;
 788                         struct dentry *dot11RTSFailureCount;
 789                         struct dentry *dot11FCSErrorCount;
 790                         struct dentry *dot11RTSSuccessCount;
 791                 } stats;
 792                 struct dentry *stations;
 793                 struct dentry *keys;
 794         } debugfs;
 795 #endif
 796 };
 797
 798 static inline struct ieee80211_sub_if_data *
 799 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
 800 {
 801         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 802
 803         BUG_ON(!local || local->mdev == dev);
 804
 805         return netdev_priv(dev);
 806 }
 807
 808 /* this struct represents 802.11n's RA/TID combination */
 809 struct ieee80211_ra_tid {
 810         u8 ra[ETH_ALEN];
 811         u16 tid;
 812 };
 813
 814 /* Parsed Information Elements */
 815 struct ieee802_11_elems {
 816         u8 *ie_start;
 817         size_t total_len;
 818
 819         /* pointers to IEs */
 820         u8 *ssid;
 821         u8 *supp_rates;
 822         u8 *fh_params;
 823         u8 *ds_params;
 824         u8 *cf_params;
 825         u8 *tim;
 826         u8 *ibss_params;
 827         u8 *challenge;
 828         u8 *wpa;
 829         u8 *rsn;
 830         u8 *erp_info;
 831         u8 *ext_supp_rates;
 832         u8 *wmm_info;
 833         u8 *wmm_param;
 834         struct ieee80211_ht_cap *ht_cap_elem;
 835         struct ieee80211_ht_info *ht_info_elem;
 836         u8 *mesh_config;
 837         u8 *mesh_id;
 838         u8 *peer_link;
 839         u8 *preq;
 840         u8 *prep;
 841         u8 *perr;
 842         u8 *ch_switch_elem;
 843         u8 *country_elem;
 844         u8 *pwr_constr_elem;
 845         u8 *quiet_elem;         /* first quite element */
 846         u8 *timeout_int;
 847
 848         /* length of them, respectively */
 849         u8 ssid_len;
 850         u8 supp_rates_len;
 851         u8 fh_params_len;
 852         u8 ds_params_len;
 853         u8 cf_params_len;
 854         u8 tim_len;
 855         u8 ibss_params_len;
 856         u8 challenge_len;
 857         u8 wpa_len;
 858         u8 rsn_len;
 859         u8 erp_info_len;
 860         u8 ext_supp_rates_len;
 861         u8 wmm_info_len;
 862         u8 wmm_param_len;
 863         u8 mesh_config_len;
 864         u8 mesh_id_len;
 865         u8 peer_link_len;
 866         u8 preq_len;
 867         u8 prep_len;
 868         u8 perr_len;
 869         u8 ch_switch_elem_len;
 870         u8 country_elem_len;
 871         u8 pwr_constr_elem_len;
 872         u8 quiet_elem_len;
 873         u8 num_of_quiet_elem;   /* can be more the one */
 874         u8 timeout_int_len;
 875 };
 876
 877 static inline struct ieee80211_local *hw_to_local(
 878         struct ieee80211_hw *hw)
 879 {
 880         return container_of(hw, struct ieee80211_local, hw);
 881 }
 882
 883 static inline struct ieee80211_hw *local_to_hw(
 884         struct ieee80211_local *local)
 885 {
 886         return &local->hw;
 887 }
 888
 889
 890 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
 891 {
 892         return compare_ether_addr(raddr, addr) == 0 ||
 893                is_broadcast_ether_addr(raddr);
 894 }
 895
 896
 897 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
 898 int ieee80211_if_config(struct ieee80211_sub_if_data *sdata, u32 changed);
 899 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
 900 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 901                                       u32 changed);
 902 void ieee80211_configure_filter(struct ieee80211_local *local);
 903
 904 /* wireless extensions */
 905 extern const struct iw_handler_def ieee80211_iw_handler_def;
 906
 907 /* STA/IBSS code */
 908 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 909 void ieee80211_scan_work(struct work_struct *work);
 910 void ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
 911                            struct ieee80211_rx_status *rx_status);
 912 int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
 913 int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
 914 int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 915 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 916                             struct ieee80211_if_sta *ifsta);
 917 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
 918                                         u8 *bssid, u8 *addr, u32 supp_rates);
 919 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 920 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 921 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
 922 u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
 923                             struct ieee802_11_elems *elems,
 924                             enum ieee80211_band band);
 925 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
 926                               u8 *ssid, size_t ssid_len);
 927 void ieee80211_send_pspoll(struct ieee80211_local *local,
 928                            struct ieee80211_sub_if_data *sdata);
 929
 930 /* scan/BSS handling */
 931 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
 932                            u8 *ssid, size_t ssid_len);
 933 int ieee80211_scan_results(struct ieee80211_local *local,
 934                            struct iw_request_info *info,
 935                            char *buf, size_t len);
 936 ieee80211_rx_result
 937 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
 938                   struct sk_buff *skb,
 939                   struct ieee80211_rx_status *rx_status);
 940 void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
 941 void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 942 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
 943                                char *ie, size_t len);
 944
 945 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
 946 int ieee80211_start_scan(struct ieee80211_sub_if_data *scan_sdata,
 947                          u8 *ssid, size_t ssid_len);
 948 struct ieee80211_bss *
 949 ieee80211_bss_info_update(struct ieee80211_local *local,
 950                           struct ieee80211_rx_status *rx_status,
 951                           struct ieee80211_mgmt *mgmt,
 952                           size_t len,
 953                           struct ieee802_11_elems *elems,
 954                           int freq, bool beacon);
 955 struct ieee80211_bss *
 956 ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
 957                      u8 *ssid, u8 ssid_len);
 958 struct ieee80211_bss *
 959 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
 960                      u8 *ssid, u8 ssid_len);
 961 void ieee80211_rx_bss_put(struct ieee80211_local *local,
 962                           struct ieee80211_bss *bss);
 963 void ieee80211_rx_bss_remove(struct ieee80211_sub_if_data *sdata, u8 *bssid,
 964                              int freq, u8 *ssid, u8 ssid_len);
 965
 966 /* interface handling */
 967 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 968                      struct net_device **new_dev, enum nl80211_iftype type,
 969                      struct vif_params *params);
 970 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
 971                              enum nl80211_iftype type);
 972 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
 973 void ieee80211_remove_interfaces(struct ieee80211_local *local);
 974
 975 /* tx handling */
 976 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
 977 void ieee80211_tx_pending(unsigned long data);
 978 int ieee80211_master_start_xmit(struct sk_buff *skb, struct net_device *dev);
 979 int ieee80211_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
 980 int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
 981
 982 /* HT */
 983 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
 984                                        struct ieee80211_ht_cap *ht_cap_ie,
 985                                        struct ieee80211_sta_ht_cap *ht_cap);
 986 u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata,
 987                         struct ieee80211_ht_info *hti,
 988                         u16 ap_ht_cap_flags);
 989 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn);
 990 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
 991                           const u8 *da, u16 tid,
 992                           u16 initiator, u16 reason_code);
 993
 994 void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da,
 995                                 u16 tid, u16 initiator, u16 reason);
 996 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
 997                                     u16 initiator, u16 reason);
 998 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta);
 999 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1000                              struct sta_info *sta,
1001                              struct ieee80211_mgmt *mgmt, size_t len);
1002 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1003                                   struct sta_info *sta,
1004                                   struct ieee80211_mgmt *mgmt,
1005                                   size_t len);
1006 void ieee80211_process_addba_request(struct ieee80211_local *local,
1007                                      struct sta_info *sta,
1008                                      struct ieee80211_mgmt *mgmt,
1009                                      size_t len);
1010
1011 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1012                                    enum ieee80211_back_parties initiator);
1013
1014 /* Spectrum management */
1015 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1016                                        struct ieee80211_mgmt *mgmt,
1017                                        size_t len);
1018 void ieee80211_chswitch_timer(unsigned long data);
1019 void ieee80211_chswitch_work(struct work_struct *work);
1020 void ieee80211_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1021                                   struct ieee80211_channel_sw_ie *sw_elem,
1022                                   struct ieee80211_bss *bss);
1023 void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1024                                  u16 capab_info, u8 *pwr_constr_elem,
1025                                  u8 pwr_constr_elem_len);
1026
1027 /* Suspend/resume */
1028 int __ieee80211_suspend(struct ieee80211_hw *hw);
1029 int __ieee80211_resume(struct ieee80211_hw *hw);
1030
1031 /* utility functions/constants */
1032 extern void *mac80211_wiphy_privid; /* for wiphy privid */
1033 extern const unsigned char rfc1042_header[6];
1034 extern const unsigned char bridge_tunnel_header[6];
1035 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
1036                         enum nl80211_iftype type);
1037 int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
1038                              int rate, int erp, int short_preamble);
1039 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
1040                                      struct ieee80211_hdr *hdr);
1041 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata);
1042 void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
1043                       int encrypt);
1044 void ieee802_11_parse_elems(u8 *start, size_t len,
1045                             struct ieee802_11_elems *elems);
1046 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
1047 u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
1048                               enum ieee80211_band band);
1049
1050 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1051 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1052 void ieee80211_dynamic_ps_timer(unsigned long data);
1053 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1054                              struct ieee80211_sub_if_data *sdata,
1055                              int powersave);
1056
1057 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1058                                      enum queue_stop_reason reason);
1059 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1060                                      enum queue_stop_reason reason);
1061
1062 #ifdef CONFIG_MAC80211_NOINLINE
1063 #define debug_noinline noinline
1064 #else
1065 #define debug_noinline
1066 #endif
1067
1068 #endif /* IEEE80211_I_H */